1. School of Materials Science
and Engineering, Hefei University of Technology, Hefei 230009, China
2. Semiconductor and Optoelectronic Technology Engineering Research Center of Anhui Province, Wuhu 241000, China
3. Department of Chemistry, Huaibei Normal University, Huaibei 235000, China
4. Department of Photonic & Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan